"Hard to believe that on clear nights, you could look up from Talax and see the shimmering lights of the colony. The night of the cascade, a bright flash cut across the sky. It was so blinding that people threw themselves to the ground. Then everything stopped, like a moment out of time, and we all looked up to see where the flash had come from, but the sky seemed oddly empty. It took most of us a few seconds to realize it was because Rinax was... gone. Of course, the moon was still there. We just couldn't see it, because of that Metreon cloud..."

"But let me tell you another [story]. A man goes back to Rinax after the cascade, back to what had been his home, to look for survivors... but the impact of the blast has set off hundreds of fires, and there's nothing there – just smoldering ruins and the stench of seared flesh. In the distance, in the middle of all that emptiness, from out of this huge cloud of billowing dust, he can see bodies moving, whimpering, coming toward him. They're monsters – their flesh horribly charred, the color of shale. One of them comes toward him, mangled arms outstretched, and he can't help it – he turns away, frightened. But then the thing speaks, and he knows by the sound of her voice that she's not a monster at all, but a child, a little girl ... Her name was Palaxia. We brought her back to Talax with the other survivors. Over the next few weeks, I stayed at her bedside, and watched her wither away." (VOY: "Jetrel")

It was not explicitly stated that Rinax was a moon of Talax, although the fact that surface details were visible from Talax seems to make that likely. In "Friendship One", Neelix described Rinax as his planet, and Talax as a neighboring planet.